what is logical method
ans- Transportation planning is a wide human-oriented field with diverse and challenging problems
waiting to be solved. Characteristics and performances of transport systems – services, costs,
infrastructures, vehicles and control systems are usually defined on the basis of quantitative
evaluation of their main effects. Most of the transport decisions take place under imprecision,
uncertainty and partial truth. Some objectives and constraints are often difficult to be measured by
crisp values. Traditional analytical techniques were found to be non-effective when dealing with
problems in which the dependencies between variables are too complex or ill-defined. Moreover,
hard computing models can not deal effectively with the transport decision-makers’ ambiguities
and uncertainties.
In the past several decades a variety of deterministic and stochastic models have been developed
to solve complex traffic and transportation engineering problems. These mathematical models use
different formulae and equations to solve such problems. During their education and training,
engineers are most often directed to the use of exclusively objective knowledge (formulae and
equations). However, when solving real-life engineering problems, linguistic information is often
encountered that is frequently hard to quantify using ‘classical’ mathematical techniques. This
linguistic information represents subjective knowledge (linguistic information).